RHEL 8 : kpatch-patch (RHSA-2021:3044)
high Nessus Plugin ID 152444
Language:
Synopsis
The remote Red Hat host is missing one or more security updates.Description
The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:3044 advisory.- kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543)
- kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)
- kernel: race condition in net/can/bcm.c leads to local privilege escalation (CVE-2021-3609)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the affected packages.See Also
https://cwe.mitre.org/data/definitions/362.html
https://cwe.mitre.org/data/definitions/787.html
https://cwe.mitre.org/data/definitions/863.html
https://access.redhat.com/security/cve/CVE-2021-3609
https://access.redhat.com/security/cve/CVE-2021-22543
https://access.redhat.com/security/cve/CVE-2021-22555
https://access.redhat.com/errata/RHSA-2021:3044
https://bugzilla.redhat.com/1965461
Plugin Details
Severity: High
ID: 152444
File Name: redhat-RHSA-2021-3044.nasl
Version: 1.8
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 8/11/2021
Updated: 5/9/2022
Supported Sensors: Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent
Risk Information
CVSS Score Source: CVE-2021-3609
VPR
Risk Factor: Critical
Score: 9.7
CVSS v2
Risk Factor: Medium
Base Score: 6.9
Temporal Score: 6
Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C
Temporal Vector: E:H/RL:OF/RC:C
CVSS v3
Risk Factor: High
Base Score: 7.8
Temporal Score: 7.5
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: E:H/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:rhel_aus:8.4, cpe:/o:redhat:rhel_e4s:8.4, cpe:/o:redhat:rhel_eus:8.4, cpe:/o:redhat:rhel_tus:8.4, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-305, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-305_10_2, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-305_3_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-305_7_1
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 8/10/2021
Vulnerability Publication Date: 4/20/2021
Exploitable With
Metasploit (Netfilter x_tables Heap OOB Write Privilege Escalation)